Operating stand for grinders



v. TQTH.

Patentd Mar. 7, 1922.

2 $HEETSSHEET I.

WITNESS:

Vihcen/i 15% INVENTOR ATTORN Y v. TO TH.

OPERATING STAND FOR GRINDERS.

UNITED STATES VINCENT TTH, OF CLEVELAND, OHIO.

OPERATING STAND FOR GRINDERS.

Specification of Letters Patent.

Patented Mar. *7, 1922.

' Application filed February 26, 1921. Serial No. 448,151.

To aZZ whom it may concern Be it known that I, VINCENT TTH, a citizen of Hungary, residing at Cleveland, in the county of Cuyahogav and State of Ohio, have invented new and useful lmprovements in Operating Stands for Grinders, of which the following .is a specification.

This invention relates to grinding devices, particularly to grind-stones, emery, or carbo runduin wheels'or the like, and has for its object the provision of an operating stand for a wheel of this character, the stand includ ing means for supporting the rotary grinding element and also including a train of gears connected with the grinding element and equipped with a hand crank for rotating the same and also having associated ther with a treadle member whereby the grinding member may be rotated either by hand or by foot power.

An important object is the provision of a stand of this character including a supporting table upon which the grinding mechanism is mounted and provided with a seat upon which the operator sits while carrying out the grinding operation.

An additional object is the provision of a device of this character which will be comparatively simple and inexpensive in manufacture, highly eflicient in use, durable in service, and a general improvement in the art.

With the above and other objects and advantages in view the invention consists in the details of construction to be hereinafter more full described and claimed, and illus trated in the accompanying drawings in which, j

Figure 1 is a plan view of my device complete,

Figure 2 is a side elevation,

Figure 3 is a front elevation,

Figure 4% is a detail view showing the means for securing the guard about the grinding member, and

Figure 5 is an enlargeddetail View showing the means for shifting from foot to hand power.

Referring more particularly to the drawings, the numeral 10 designates a supporting table which may be of any suitable material and of any suitable structure provided only that it be sufiiciently strong and rigid as to withstand the strain to which it is subjected. Extending from one side of the table are supports 11 which carry a seat 12 spaced from the table and upon which the operator may sit while operating the machine.

Secured upon the top of the table by any suitable means, are spaced plates 13 extending vertically and in parallel relation, and between the upper ends of these plates is disposed a grinding wheel let mounted upon the shaft 15. Outwardly of one plate, the shaft 15 carries a pinion 16 with which meshes a gear 17 which is the endmost one of a train of gears 18 which areall journaled upon one of the plates and which are for the purpose of revolving the grinding wheel at very high speed. The other endmost gear of the train is provided with a crank handle 19 by means of which the train of gears and consequently the grinding wheel may be rotated.

Disposed in substantially encircling relation to the grinding wheel is a guard formed as an arcuate metal strip 20 which is secured in place by suitable arms 21 secured thereto and carrying bolts 22 passing through one of the plates 13 and provided with clamping nuts 23. The purpose of this strip is to prevent injury to the grinding wheel by the falling of a heavy object thereonto and is also for the'purpose of preventing dust. sparks, and particles of ground material from flying into the face of the operator.

In order that the device may be operated by foot power, when desired, I provide depending supports 24 beneath the table and between these supports is journaled a shaft 25 having a crank portion 26 to which is connected a link 27 connected with a treadle 28. The shaft 25 has a gear 29 splined thereon and an operating lever 30 is provided for shifting this gear 29 into and out of engagement with one of. the train of gears 18.

It will be seen that when it is desired to rotate the grinding wheel by hand, the gear 29 is thrown out of mesh with the associated one of the train of gears and the crank handle 10 is turned to rotate the grinding wheel. When it is desired to operate the device by foot power, the gear 29 is slid into mesh with the associated one of the train of gears whereupon operation of the treadle will result in rotation of the train of gears and consequently the grinding whee From the foregoing description and a. study of the drawings it will be apparent that Ihave thus provided a simple and yet highly eflicient device in the nature of a stand and operating mechanism for driving a grinding Wheel of any character and it will 7 be observed that my device will be conven ient in operation.

While I have shown and, described the preferred embodiment of my invention, it is of course to be understood that I reserve the right to make such changes in the form,

construction, and arrangement of parts as will not depart from the spiritof the invention or the; scope'of the subjoined claims.

Having thus described my invention, I claim: r p r 1. A device of the character described comprising a supporting table, a seat supported in spaced relation to one edge thereof, a treadle pivoted beneath the table, a pair of'supports depending from the table, a crank shaft journaled through said supports and having a crank portion connected with said treadle, a pair of spaced plates secured upon said table, a grinding Wheel mounted upon a shaft journaled between ion, a crank handle on one of said gears and means for connecting or disconnecting said crank shaft With said train of gears.

2. A device of the character described comprising supporting table, a seat supported in spaced relation to one edge thereof, a treadle pivoted beneath the table, a

pairof suppoits depending from the table,

a crank shaft journaled through said sup- 7 ports and having a crank portion connect ed With said treadle, a pair ofispaced plates secured upon said table, a grinding Wheel mounted upon a shaft journaled between said plates, a pinion on said last named shaft, a

train of gears for driving said pinion, a-

crank handle on one of said gears, and means for connecting ordisconnecting said crank shaft Withsaid train of gears, said means comprising a gear splined upon said crank shaft, and a shifting lever for'moving said last named gear into or out of mesh With one of said train of gears. H

Intestimony whereof I affix my sign ture.

VINCENT TOTH. 

